Hydraulic motor.



L. PURPURA.

HYDRAULIC MOTOR.

APPLICATION FILED SEPT.13, 1911.

Patented July 9, 1912.

4 SHEETS-SHEET 1.

L. PURPURA.

HYDRAULIC MOTOR.

APPLICATION FILED SEPT. 13, 1911.

Patented Jul 9, 1912.

4 SHEETSSHEET 2.

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171501-50 Pwpw'w G de mugs L. PURPURA.

HYDRAULIC MDTOR.

' APPLICATION FILED SEPT. 13, 1911. 1,032,344 Patented July 9, 1912.

4 SHEETS-SHEET 3.

s W M L. PURPURA.

HYDRAULIC MOTOR.

APPLICATION FILED SEPT.13,1911.

Patented July 9, 1912.

4 SHEETSSHEET 4.

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'LIIBORIO PURPURA, or WHEELING, w-Es'rvmemm;

' HYDRAULIC MOTOR.

To all whom it may concern:

Be it known that I,-L1B0RI0 PURPURA, a citizen' of the United States,residing at Wheeling, in the'county of Ohio and State of West Virginia,have invented certain new and useful Improvements in Hydraulic Motors,of-which the following. is=a specificat-ion.

This invention relates generally to hydraulic motors, being directedspecifically .to that type of motordesigned to be used in conjunctionwith and deriving-its motive force from the pressure of a-city; watermain or the like.

While the invention is adapted primarily to utilize Water'underpressure, as before mentioned, as the motive fluid, other mediums, suchas air, steam and the like. may be employed to Operate the motor.

Salient features of the invention reside in cooperating oscillatingvalves, embracing a plurality of passages alternately serving asinduction and eduction ports, and in a system of specially disposedmotive fluid conduits.

While the invention is shown and described as in connection with theoperation of a washing machine it is obvious that it is equally welladapted to be employed in the operation of other classes of machines,particularly those wherein the work to be performed is consistent withthe use of power equal to that of water under the ordinary citypressure.

One object ofthe invention is the production of a motor primarilyadapted for the operation of a washing-machine and which can be readilyattached to and disconnected from any ordinary water spigot byinexperienced persons and which, when so attached and the motorinitially started will require no further attention until the Washingoperation is thoroughly'and effectively accom lished.

Another 0 ject is to produce a motor as simply constructed as ispossible with the result gained, wherein, due to the-disposition andconstruction-of the'operating parts and the material of which theyareformed, friction, and incident-ally wear, is reduced to a minimum, thusinsuring long. life to the apparatus under hard use.

Another object is the production of a motor wherein is avoidedpositioning valves Specification of- Letters Patent.

Application filed September 18, 1911. Serial No. 649,015.

contemplated that the Patented July9, 1912.

within a piston cylinder, a construction disadvanta'geouslycommon to alarge class of washlngmachine motors and the occasion of much troubleand necessitating experiencedattention and care at the frequent perlodsof their disarrangement from operative vention beingso constructed,irrespective of their positions, that they are at all times 1n;readiness to be immediately and operat vely. acted on by the pressurmedium belng. introduced into the motor, no dead center in the operativemovement of the valves being possible.

Another object is to provide a motor which can be effectually and easilyconnected for operation with any ordinary type of washing machineagitator, it being motor, through the medium of the ordinary gear orpinion, be espedially adapted for use in conjunction with theoscillating. type of agitator embracing a plurality of downwardly-extending stirring elements.

With these as the main objects of the invention the latter will now bedescribed in the following specification, taken in connection with theaccompanying drawings.

wherein is disclosed the details of the preferred form of the invention,and then more particularly pointed out-in the appended claims.

Referring to the drawings, Figure 1 is a perspective of the motor shownin operative relation with the agitator shaft of a washing machine. Fig.2 is a vertical central section through the main valve and pistoncylinder. Fig. 3 is a vertical section, partly in' elevation through thepilot valve. Fig. 4 is a transverse section through the main and pilotvalves and the piston cylinder. Fig. 5 is a section similar to Fig. 4taken on a lower plane. Fig. 6 is a transverse section through the'valvecasing and cylinder showing the valves disposed to receive initialintake of the motive fluid. Fig. 7 is'a transverse vertical section,partly in elevation taken through the main and pilot valves. Fig. 8 is avertical central section, partly in elevation showing the mechanism foroperating the pilot valve. Fig. 9 is a perspective of the pilot valve.Fig. 10 is a perspective of the main valve. Fig. 11 is a perspectiveview, partly in section, illusparts throughout several views, theinven-.

tion comprises a valve casing 1', the plan contour of which is shown inFigs. 4, 5, and 6, and within which are disposed valve chambers 2 and 3designed to receive respectively main and pilot valves 4 and 5. The bodyof the valve casing inclos'ing the two valve chambers is preferably castintegral, of any suitable material, and in the instance of main valve 4said material extends below seat 6 solidly, as at 8 with the exceptionof a space later to be described, to within a distance of the lower edgeof the casing appropriate to permit the seating of a removablescrew-threaded cap 9 as shown in Fig. 2. In the instance of valve 5 acavity 10 is'provided to permit the movement of parts controlling theoscillation of said valve and to be later explained. Valves 4 and 5 areprovided res ectively with integral downwardly-exten ing shafts 11 and12 projecting through apertures 13 and 14 formed respectively in valveseats 6 and 7 shaft 11, formed hollow for a portion of its length,projecting entirely through portion 8 of the valve caslng, as shown inFig. 7 and ing provided with a longitudinal slot 15 coextensive inlength with the hollow portion of said shaft, a shutter or wing 15,formed terminally throughout its vertical dimens'ion with enlargedretaining head 16 adapted, when said wing is operatively positioned withrelation to shaft 11 to lie within the hollow portion. thereof andprevent disengagement of said shaft and wing, the latter being adaptedfor limited oscillation within a chamber 17 formed in portion 8 of theeasing and radially disposed with relation to the bearing of shaft 11 insaid portion.

To the lower terminal of shaft 12 of valve 5, extending downward intocavity 10 an appropriate distance, is rigidly connected by any suitablemethod, either permanently or removably, an operating finger 18 the freeterminal of which extends between the forks of the bifurcated head 19 ofrod 20, the latter adapted for longitudinal reciprocation throughcylinder head 21, the construction ermitting necessary play of finger 18within the forks of said rod in the reciprocation of the latter. Shaft20 is attached by connecting arm 21' to a sleeve 22 adapted forreciprocating movement on a fixed guide pin 23 formed integral with orrigidly secured to cylinder head 21 and centrally extending therefromwithin the cylinder 24 an appropriate distance, as shown in Fig. 4, saidsleeve being provided adjacent its free terminal with shoulder 25 for apurpose hereinafter to be set forth.

26 denotes a piston rod formed hollow for a pottion of its length andcarrying piston head27, adapted for reciprocation on sleeve 22 throughbearing 28 of cylinder head 29, cylinder heads 21 and 29 being providedwith "the usual cylinder seats and held to operative relative by meansof tie-rods 30, asusual. Securely attached, in a removable manner isdesired, to. the face of iston head 27 is a trip member 31 as shown inFig. 8, and formed with a sleeve extension 32 disposed within saidpiston head, designed at a certain time in the forward travel of .thepiston rod to contact with shoulder 25 of sleeve 22 and move the latterin the same direction of travel, thereby exerting a pull on rod 20, and,through the medium of finger 18, produce a partial oscillation of valve5 on its seat 6 as clearly understood from Figs. 4 and 6.

33 denotes a motive fluid conduit connecting the valve casing 1 andcylinder head 29 as shown in Figs. 4, 5 and 6 and providingcommunication with the piston cylinder through channel 33' and 33 insaid head in the rear of the piston head for functional reasons to besubsequently specified.

Detachably connected to piston rod 26 is toothed rack 34 designed ofcourse to mesh with pinion 35 as shown in Fig. 1 and, in reciprocationof said rack, oscillate shaft 36 of said pinion and impart desiredmovement to parts connected thereto, as for instance the dasher ofwashing machine or the like.

37 denotes an inlet conduit and 38 an outlet conduit preferably adaptedfor screwthreaded connection with casing 1 and terminally provided ifdesired with hosethreads for ready connection with the usual hosecoupling, conduit 37 being designed of course for attachment to thesource of motive fluid, as for instance an ordinary spigot dium of asection of hose or the like (not shown).

Valve 4 is formed with a main inlet port 39 provided with a superposedcommunicating deflecting groove 40 formed in the valve body as shown inFig. 10 and communicating with each of ports 41 and 42 through thevalve, said ports and connecting channels being disposed in the samehorizontal plane,

" ports 41 and 42 bein with each other. V alve 4 is also provided withcommunicating ports 43, 44, 45 and 46, the channels connecting saidports being disposed for clearance purposes in a horizontal plane abovethat of the channel con necting ports 39, 41, and 42 and coincident withthe plane in which the guide groove 40 is disposed. Valve chamber v2 isprovided with ports 47, 48, 49, and 50 port 49 communicating directlywith the piston cylinder through cylinder head 21, ports 47 48 and 50being disposed in a plane coinciding with the plane of ports 43, 44 and46 and of the city water system, through the mealso in communication thedeflecting groove 40, when the valve is seated in operative position,while port 49 is disposed in the same plane as ports 39,.

horizontal plane within the valve body.

Valve 5 is also formed with communicating ports 57, 58, .59 and 60, allof said ports lying in the same horizontal plane disposed, for clearancepurposes, above the plane 'of ports 51, 53 and 54 and in a planecoincident with that of guide-grooves 52, 55 and 56. I

Valve chamber 3 is provided with ports 61, 62, 63 and 64, ports 62 and64 lying in the same horizontal plane coincident with that of ports 57,58, 59 and 60 of valve 5 when the latter is operatively seated, whileports 61 and 63 are disposed in the same horizontal plane coincidentwith the plane of guide-grooves 55 and 56 under similar conditions. portformed in the bottom of inlet pipe 37 and connected, by means of pilotchannels 66, passing through the casing, to valve chamber inlet port 61,67 denoting an outlet or exhaust port formed in eduction pipe 38 andconnected by means of channels 68 with port 64 of valve chamber 3.

69 denotes a port formed in one wall of wing chamber 17, connected bymeans of channel 70 to port 62 of valve chamber 3, while 71 denotes aport formed in the opposite wall of wing chamber 17 and disposed insimilar relative position as port 69,-and connected by means of channel72 to port 63 of valve chamber 3.

The operation is as follows: Assuming the parts positioned as disclosedin Fig. 6, wherein piston head 27 is at the limit of its rearward travelguide-groove 40 and port 41 of valve 4 are respectively registering withinlet port 47 and port 49 of valve chamber 2, while ports 44 and 46 ofvalve 4 are registering with ports 48 and exhaust port 50 of saidchamber. Simultaneously with the above described registration of portsof valve 4 ports 57 and 59 of valve 5 are registering with inlet port 61and 62 respectively, while guide-groove 56 is registering with valvechamber port 63, in which relative position of the valves, and pistonhead, ports 42, 43, and 45 of valve 4 and ports 53, 58 and 60 of valve 5are blocked and incidentally idle, wing 15 be- 65 denotes an intake orinlet.

ing disposed at the limit of its movement in one direction in wingchamber 17, as shown in Fig. 6. At the stage of operation represented byFig. 6 the course of the motive fluid is as follows: Connection havingbeen established with the source of power the motive fluid entersinduction pipe 37, passing into guide-groove 40 and being deflectedthereby into inlet port 39, as clearly shown in Fig. 2, then throu hvalve 4 to communicating port 41 of sai valve, thence through port 49 ofvalve chamber 2 and through cylinder head 21 into the piston cylinderand impinges against piston head 27, said motive fluid simultaneouslywith the above described movement, entering port 65, passing throughpilot channel 66, through port 61 of valve chamber 3 into port 57 ofvalve 5, through the valve to port 59 and thence into port 62 registeredtherewith, and into channel 70, emerging therefrom through port 69 inwing chamber 17 and impinging against Wing 15' and forcing the latter tothe position disclosed by Fig. 6, said wing, in this movement, underimpulse of said motive fluid, exhausting that portion of wing chamber 17in the path of its movement, through port 71 of said chamber, throughchannel 72, through port 63. of valve chamber 3, into guide-groove 56 ofvalve 5, being deflected downward there- 'by into port 54, through saidvalve, thence,

through port 51, up through communicating guide-groove 52, nowregistered with port 64 of valve chamber 3, through the latter port intochannel 68, thence out of port 67 and through exhaust pipe 38 from whichthe exhaust may of course be directed by means of suitable hoseconnection to any convenient drainage.

lVhen the valves are disposed in the abovedescribed relation the motivefluid is acting through port 49 on piston head 27 which of course isbeing forced and imparting a throw to rack 34, exhaust from the pistoncylinder being provided for through port 33", channel 33, conduit 33,port 48 of valve chamber 2, port 44 of valve 2, through said valve, outof port 46 of the latter, through port 50 of valve chamber 2 and intoexhaust pipe 38 and thence to drainage. During the forward movement ofthe piston up to the point immediately previous to contact of sleeveextension 32 of trip member 31 with shoulder 25 of sleeve 22 no changehas occurred in the disposition ofvalve 5 as disclosed by Fig. 6.Immediatelyon contact of extension 32 with shoulder 25 and during and upto the limit of the remaining forward movement of the'piston, pull isexerted on sleeve 22, which, moving forward on guide-pin 23 under theinfluence of said pull, occasions, through arm 21, a forward throw ofrod 20 which in turn, through the medium of bifurcated head 19 thereofand coiiperating finger 18 imparts a partial oscillation to valve 5 (inthe direction of the arrow in Fig. 6) and disposes said valve inaccordance with the disclosure in Fig. 4, at the limit of said forwardmovement. Previous to the limit of the above described partialoscillation of valve 5, no change has taken place in the position ofvalve 4. Simultaneously with piston head 27 reaching the limit of itsforward stroke and valve 5 reaching the limit ofits described partialoscillation under the influence of said stroke, provision is made forthe return stroke of said piston and the necessary exhaust of the deadfluid through the following described arrangement of ports and channels,occasioned by the above described disposition of valve 5 under theinfluence of piston rod 26, as shown in Fig. 4, valve 4 being partiallyoscillated from position shown in Fig. 6 to that indicated by Fig. 4immediately subsequent to the attainment of the position disclosed bysaid figure of valve 5 and iston head 27, and previous, of course, toinitial return stroke of piston rod 26, and providing for the pistonreturn stroke and the exhaust. Referring to said Fig. 4 it will be seenthat as valve 5 reaches the limit of its partial oscillation,guide-groove 52, port 58, port 53 and port 60 of valve 5 registerrespectively with ports 61, 62, 63 and 64 of valve chamber 3 while ports57, 59 and 54 are blocked and idle, the above described registration ofsaid ports permitting the entrance of motive fluid through port 65,channel 66, port 61 of valve chamber 3, into deflecting groove 52 downinto port 51, as clearly shown in Fig. 3, through the valve to port 53,thence into port 63, through channel 72, out of wing chamber port 71 andimpinging on wing 15 and forcing the latter to the opposite side of saidchamber in position as illustrated in Fig. 4,the exhaust from saidchamber being provided for through the registration occasioned in themovement of valve 5 to position shown in Fi 4, of communicating ports 58and (30 of sa1d valve with ports 62 and 64 respectively of valve chamber3, providing unobstructed passage for the motive fluid exhausting fromwing chamber 17 through channel port 69, channel 70, port 62 of valvechamber 3, port- 58 to communicating valve port 60, thence through valvechamber port 64, channel 68 and port (37 whence it passes throughexhaust pipe 38 to atmosphere or-drainage in accordance with the natureof the motive fluid being employed.

The movement just described of wing 15, through its connect-ion withshaft 11 of valve 4 produces a partial oscillation of the latter in thedirection indicated by the arrow and causes registration of ports 43,45, 42 and deflecting groove 40, communicating with port 39, of valve 4with ports 47, 48, 49

and 50 of valve chamber 2 respectively, all other ports of said valvebeing meanwhile blocked and idle, and providing for passage of motivefluid through inlet pipe 37, port 47 of valve chamber 2, ports 43 and 45of valve 4, port 48 of valve chamber 2, thence through conduit 33,through channel 33 and port 33 whence it impinges upon the front face ofpiston head 27 which, under the pressure of said motive fluid thusintroduced, will begin to move in its return stroke and of course causethe return stroke in the reciprocation of rack 34, exhaust from thepiston cylinder before the travel of piston head being provided throughport 49, ports 42 and 39 of valve 4, thence upward'through deflectinggroove 40 of port 39, through exhaust port 50 and out of exhaust pipe38.

Fig. 5 illustrates the position of the valves and course of the motivefluid during the partially completed return stroke of the piston, saidposition and ports being similar to that disclosed by Fig. 4 andremaining unchanged until the piston head contacts with arm 21,operating rod 20, and, through the medium of finger 18, producing apartial oscillation of valve 5 to position shown in Fig. 6, valve 4meanwhile remaining in position shown in Fig. 4 until valve 5 hasreached the limit of its movement in said partial oscillation, pistonhead 27 having simultaneously reached the limit of its return stroke,when the motive fluid will take the course as before described inconnection with Fig. 6, producing, through movement of wing 15 a partialoscillation of valve 4 to position illustrated by Fig. 6, when thepiston head will receive impact of the motive fluid and begin anotherforward stroke, exhaust being accomplished as described in connectionwith the position of the parts as illustrated in said figure.

73 denotes a plurality of leakage chan nels, extending in parallelrelation verti cally through valve 4, practice having demonstrated theadvisability of including said channels in the structure to eliminateany tendency of said valve to bind in its chamber in operation or beslightly displaced from operative relation, in order to insure accurateand correctly-timed registration of the various ports at a predeterminedmoment in said operation.

74 indicates a bottom plate adapted for screw-threaded connection withthe lower edge of that part of the casing inclosing controlling valve 5,and permitting, in conjunction with cap 9, and caps 75 and 76 coming invcontact with the motive fluid in operation are provided with suitablepacking to establish tight connections.

7 7 denotes a bed plate to which the motor is removably connected in anypreferred manner, said plate being detachably fixed to the usual hingedtub cover and being formed adjacent one end with an upwardly projectingguide lug 7 8 designed, when motor and bed plate are assembled, toextend through slot 79 of rack 34 and insure reciprocation of the latterin a desired permanent plane for accurate cotiperation with pinion 35,80 indicating a series of drip-grooves adapted to receive, in theinstance when water is employed as the motive fluid, any leakage fromthe operation of the motor, from which grooves said leakage may bereadily and conveniently removed by the use of a sponge or the like.

Referring to Figs.4, 5 and 6 it will be observed that in each of saidfigures that those ports of both the main and pilot valves which aredisposed in one plane are shown in dotted lines while the ports disposedin the other plane are shown in full lines.

Having thus described my invention, what I claim as new and desiretosecure by Letters Patent, is

1. In a hydraulic motor, a piston, a main valve for controlling the flowof the motive fluid to opposite sides of the piston, a wing carried bythe main valve, and an independent automatically-actuated pilot valve todirect the motive fluid into contact with the wing to operate the mainvalve.

2. In a hydraulic motor, a piston, a main valve for controlling the flowof the motive fluid to opposite sides of the piston, a wing carried bythe main valve, and an independent piston-operated pilot valve to directthe motive fluid into contact with the wing to operate the main valve.

3. In a hydraulic motor, a piston, a main valve to control the flow ofthe motive fluid to opposite sides of the piston,.a wing removablyconnected to the main valve, an independent pilot valve to control theflow of the motive fluid to opposite sides of the wing, and operatingconnections between the piston and pilot valve.

4. In a hydraulic motor, a piston, a main valve to control the flow ofthe motive flu d to opposite sides of the piston, a wing removablyconnected to the main valve, an independent pilot valve to control theflow of the motive fluid to opposite sides of the wing, and operatingconnections between the piston and pilot valve serving to operate saidpilot valve during a portion of the movement of the piston at itsrespective extremes of stroke.

5. In a hydraulic motor, a piston, a main rotary valve for controllingthe flow of the motive fluid to opposite sides of the piston,

said valve being formed with two main superimposed channels each adaptedfor service as supply and exhaust channels in accordance with theposition of the valve, and means controlled by the piston for utilizingthe motive fluid for directly actuating the main rotary valve.

6. In a hydraulic motor, a casing, a piston operating therein, a mainrotary valve for controlling the flow of the motive fluid to the piston,an independent pilot valve operated by the piston and directing themotive fluid, and a wing carried by and .arranged below the main rotaryvalve to directly receivethe impact of the motive fluid through thepilot valve whereby to position said main rotary valve.

7. In a hydraulic motor, a casing, a piston operating therein, a mainrotary valve for controlling the flow of motive fluid to the plston,said casing being formed with inlet and exhaust channels, said mainrotary valve being formed with two horizontally offset channels openingwholly through the valve, each of said channels successivelycotiperating with the inlet and exhaust channels of the casing, a wingcarried by the main rotary valve, and means actuated by the piston todirect the motive fluid against the wing to position the main rotaryvalve.

8. In a hydraulic motor, a casing, a piston operating therein, a mainrotary valve for controlling the flow of motive fluid to the piston,said casing being formed with inlet and exhaust channels, said mainrotary valve being formed with two horizontally oflset channels openingwholly through the valve, each of said channels successively cooperatingwith the inlet and exhaust channels of the casing, a wing carried by themain rotary valve, and an auxiliary rotary valve controlled by thepiston and directing the motive fluid into contact with the wing toposition the main rotary valve.

9. In a hydraulic motor, a piston, and a valve for directing the motivefluid to opposite sides of said piston, said valve being formed with twohorizontally-offset channels opening wholly through the valve, each ofsaid channels serving successively as inlet and exhaust ports for thepiston control, one of said channels communicating at one end with averticallyarranged groove formed in the valve body to provide for thecoiiperation of said channel with either of two vertically-spaced feedconduits.

10. A hydraulic motor including a casing, a piston therein, a mainvalve. a wing carried by the main valve, a pilot valve for controllingthe flow of the motive fluid to the wing, said pilot valve havingsuperimposed ports opening therethrough and each successively serving asinlet and exhaust ports for the wing-operating fluid.

11. A hydraulic motor including a casing,

successively serving as inlet and exhaust orts for the win -operatinfluid, said casmgbeing forme with m et and exhaust passages arranged ondifierent planes, and

10 said pilot valve being formed with a groove in communication with oneof said ports whereby to permit said port to communicate with both ofsaid passages alternately.

In testimon whereof, I aflix my signature in presence -0 two witnesses.

LIBORIO PURPURA.

Witnesses:

HARRY L. GOULD, BENNEI'I S. J omus.

